Gas-lamp.



M. L. KBISEB..

GAS LAMP.

, APPLICATION I'ILED 0012.4, 1909. w

Patented 0011.31, 1911.

COLUMBIA PUNOGRPH C0.

M. L. KBISER.

GAS LAMP. APPLICATION 'ILD 00T.,1909.

Patend 001. 81, 1911.

TNTVEDv STTES 'PTENT OFFICE.

MARTIN L. KEISER, OF CANTON, OI-IIO, ASSIGNOIR. T0 THE McLAIN-G'ARWOOD COMPANY, OF GANTON, OHIO, A CORPORATION OF OHIO.

GAS-LAMP.

T0 aZZ who'm 'it 'may concern:

Be it known that I, MARTIN L. KEISER, a citizen of the United States, residing at Canton, in the county of Stark and State of Ohio, (c/o The McLain-Garwood Co., Canton, Ohio,) have inventecl certain new and useful Improvements in and Relating to Gas-Lamps, of wliich the following is a specification.

This invention relates to a gas lamp having inverted incandescent burners.

The invention consists of an outer or inclosing casing, a series of miXing tubes and incan'descent burners mounted therein, a valve mechanism, and an inner casing adapted to protect the mixing tubes and to quicldy carry off the products of combustion, all of these parts coperating to produce a gas lamp of simple construction comprising a series of inverted incandescent burners and to promote a circulation of air across the burners and up through the inner casing.

The invention also consists of the combination or combinations of parts hereinafter described and definitely set forth in the annexed claims.

For the purpose of illustration, I have, in the accompanying drawings, shown and herein described one form of apparatus embodying my invention.

In the drawings: Figure 1 is a Vertical section of a gas lamp embodying my invention. Fig. 2 is a horizontal section on the line 2-2, of Fig. 1. Fig. 8 is an elevation of the inner casing. Figs. 4: to 10, inclusive, are detail views. Fig. 11 is a bottom plan view of the casing or flue and the closing plate therefor. Figs. 12 to 15 are detail views of one of the mixing tubes and the valves therefor.

Referring to the drawings, 1 indicates an outer or inclosing casing having a main body portion 1a, a top portion 1b, and a lower portion 1G. These parts are preferably formed separately to facilitate their construction and may be secured together in any well known manner.

2 indicates an annular base carried by the body 1a on its interior surface.

3 indicates a skirt having an outwardly flaring open end, as shown at 8a, the pur- Specificaton of Letters Patent.

Application filed October 4, 1909.

Patented Oct. 31, 1911.

Serial No. 520,812.

pose of which will hereinafter be set forth.``

The skirt 3 is preferably provided with lips or a fiange around its upper end, each of which lips is riveted, 01' otherwise secured, to the said base 2.

11 indicates a hood located above the casing and spaced therefrom to permit the es- Cape of the products of combustion from the top of the lamp.

5 indicates a globe of a suitable shape secured to the lower end of the casing 1 in a well lniown manner and adapted to inclose the cluster of lights;

6 indicates a gas supply pipe eXtending downwardly from some suitable support. The hood 4 is formed with a central open- .ing through which the pipe 6 eXtends. The pipe 6 preferably serves as a support for the hood 4, it being secured thereto by a set screw 4a and by which it may be adjustably positioned on the said pipe relative to the upper, open end of the oasing to permit the escape of the products of combustion.

'7 indicates a series of pipes, four being shown in the drawings, eXtending preferably at right angles to the supply pipe 6, and each being connected atits inner end to a coupling member 6a. The coupling 6a is preferably arranged centrally of and at or near the open end of the casing 1 directly in the path of the heat and products of combustion from the lamps in order to superheat the gas before it reaches the mixing tubes of the lamps. Each of the said pipes 7 is provided with a depending or connecting pipe 7a.

8 indicates mixing tubes, one for each of the pipes 7a. 9 indicates a valve carrying and supporting connection interposed between the lower end of each of the pipes 7a and the upper end of an adjacent mixing tube 8. Each of said connections is provided with screw threads 9a, 9b, whereby the adjoining ends of the adj acent pipes 7a and mixing tube 8 ,are connected therewith. The lower end of each connection 9 is closed by a cap 90, which is formed with a central aperture 9(1 forming a valve seat for a needle valve 10 to regulate the flow of the gas from the pipe 'SL to the mixing tube 8.

10*L indicates a turning pin eXtending outwardly from the sleeve 9. The inner end of the pin 10a is connected with the needle valve 10, while its outer end is irregular in cross-section and adapted to receive `a turning key 10. The casing body 1a is formed with an opening or slot 1d through which the key 10b is inserted to turn the pin 10a. By the rotation of the pin 10CL the needle valve 10 is reciprocated relative to its seat 9d.

8a indicates a series of spaced openings formed in each of the mixing tubes, preferably near' its upper end and below the cap 90 of the needle Valve.

12 indicates a collar for each of the mixing tubes S rotatably inounted thereon, and formed with a series of spaced openings 12a adapted to register with the openings 8a of the adj acent mixing tube 8 to permit the intake of air thereinto.

12b indicates an arm or plate carried by each of the collars 12, whereby the latter may be readily adjusted. The casing body 1a is formed with a series of openings le, one being formed adjacent to or opposite each of the arms 12b to permit the key 10b or other device, to be inserted therethrough to adj ust or operate the intake Valve or collar 12. It will be understood that by adjusting each of the collars or Valves 12 the openings 8a of the mixing tubes will be opened to a greater 01' less extent, thus regulating the intalte of air to the mixing tubes.

13 indicates a series of mantles, one for each of the mixing tubes S, depending in an inverted position from the lower ends thereof. These mantles may be supported in any suitable or preferred manner.

14 indicates a casing or flue arranged within the casing 1 and adapted to protect the mixing tubes 8 and the gas and air inlet yalves from the heat and products of combustion arising from the incandescentlights or mantles 13. The casing 14 being open at its upper and lower ends forms a free and unobstructed passage for the heat and products of combustion whereby they may rise directly from the lights and pass out through the upper ends of the casings 14 and 1. In order to provide a large fiue space for the heat and products of combustion and to permit these elements to rise directly, Vertically, from the lights 13, as well as to amply protect the mixing tubes 8, the casing 14 is corrugated longitudinally, as is illustrated in the cross sectional View, Fig. 2. Referring to this sectional view it will be seen that the corrugations of the casing 14 are formed alternately with inner and outer members, the inner extending members being of relatively small contour, as indicated at 14a, while the outer extending corrugations are of relatively large contour, as indicated at 14h, the latter extending outwardly sutticiently far to lie close to the inner circumferential surface of the casing body 1a. By this construction it will be seen that a series of longitudinally extending spaces 14c are formed between the walls of the inner corrugations 14a and the inner wall of the casing 1, through which longitudinally extending spaces are arranged the pipes 7a, the mixing tubes 8, and the gas and air inlet valves.

15 indicates an annular closing plate carried by the lower' end of the inner casing 14. The inner perimeter of this closing plate corresponds to the shape, in crosssection, of the inner walls of the said casing 14, whereby the lower ends of the longitudinally extending spaces 14c are closed to prevent any heat or products of combustion rising therein. The closing plate 15 is formed with a series of openings 15a, one for each of the mixing tubes 8 through which openings the latter extend. It will also be seen by the above described construction of the inner casing 14 that the inner extending corrugations thereof are of a size to closely fit around the pipes 7a and mixing tubes 8, so that the heat and products of combustion may ascend Vertically, directly, from the mantles 13, the latter being somewhat larger in diameter than the width of the inner corrugations 14, so that only a small portion of the heat and products of combustion engages with or is deflected by the lower surface of the closing plate 15 into the flue or casing 14. The inner' perimeter of the closing plate 15 is preferably provided with fianges 15b to engage the inner walls of the corrugations 14a, and its outer edge is provded with a tlange 15c which is secured to the outer' edges or walls of the corrugations 141). .These fianges operate to secure the closing plate to the casing 14 and to prevent the escape of the heat and products of combustion into the longitudinally extending spaces 14c or between the inner and'outer walls of the casings 14 and 1. The casing 14 is provided with cutaway portions 14 at its upper end to receive the pipes 7. The lower ends of the mixing tubes 8 are provided with screw threads to receive nuts 146. By screwing up the nuts against the plate 15, the casing 14 is locked or held firmly against the pipes 7 and rigidly maintained in position relative to the pipes 7a and mixing tubes S. The over-all diameter of the casing 14 is preferably such that when it is placed in the lamp casing 1 the walls of the outer corrugations 14b lie close to or engage with the inner walls of the casing 1 and maintain the casing 14 concentrically therein. The lower end of the casing 14 rests upon the annular base 2, while its upper end is provided with apertured straps or lugs 1G to receive spring operated dogs 17 mounted upon the casing 1. The base 2 may be slightly depressed or countersunk,

as shown at 2' to receive the plate 15, whereby the latter will be properly positioned; The body portion 1a of the casing 1 is formed with a plurality of openings lf, lg, in Close proXimity to the air inlet valves 12, while the lower portion 1 of the casing is formed with a plurality of openings 1h which permit a free CirCulation of air through the casing and within the globe 5, the flaring opened end of the skirt 3 Operating to defiect these air currents downwardly into the lower portion of the space within the globe 5. As the annular base 2 and Closing plate 15 close entirely the lower ends of the longitudinally extending spaces 14 containing the mixing tubes 8, it will be seen that all of the air circulating through the openings 111 is carried downwardly within the globe 5 and assists in the colnbustion of the gas and in carrying ofi the heat and products of combustion through the fiue 14 and the upper open end of the casing 1. This construction of base 2 and closing plate 15 also prevents any of the heat or products of combustion ascending into the space surrounding the mixing tubes 8 and their air inlet valves. i

18 indicates as a whole, a main valve mechanism arranged in the gas supply pipe 6 preferably below the hood 4 and operating to control the supply of gas to all the pipes 7. This valve mechanism-preferably comprises a, casing 18al formed with a gas receiving Chamber 18b and having an offset 18 formed with a conduit 18' leading from the Chamber 18b to a pilot light tube 19. The valve casing 18a and coupling 6 are preferably formed integral and Comprise a connecting means between the gas supply pipe 6 and the pipes 7. The valve casing 18'"L is also formed with a valve-receiving Chamber 18a, a main gas conduit 18 connected at its upper end with the gas receiving Chamber 18, and at its lower end connected with ducts 18t formed in the coupling 62L and leading to the inner ends of three of the pipes 7, and an auXiliary conduit 18g leading from the gas receiving Chamber 18b to a duct 18h formed in the coupling 6*L and leading to the inner end of one, the remaining one, of the pipes 7 In order to regulate the normal or perpetual flow of gas to the pilottube 19, a valve 182, mounted in the offset 18, is provided to open and close the opening for the conduit 18' from the gas receiving Chamber 18h.

20 indicates a valve rotatably mounted in the valve receiving Chamber 18d of the valve casing 18a and formed with a main duct 201 adapted to register with the main conduit 18e of the valve casing 18, and also formed with a pair of intersecting auxiliary ducts 20h, 20 one of which is adapted to register with the auxiliary conduit 18g of the valve casing when the main duet 20a of the valve 20 and main conduit 18 of the valve casing are in register, while the other auxiliary duet is adapted to register with the auxiliary conduit 18g of the valve casing 18*JL when the valve 20 is slightly turned, as indicated in Fig. 8, to close the main conduit 18. By this construction it will be seen that by proper manipulation of the Valve 20 one only or all of the inverted lights 13 may be lighted. By a further manipulation of the valve to the position shown in Fig. 7, all of the lights may be shut off. 21 indicates a duet leading from the conduit 18' to the valve receiving Chamber 18. The purpose of this conduit is to provide a supply of gas to the pilot 19 to cause a fiash during the turning of the valve 20 and just prior to the registry of the duct 20a with the main conduit 18, and it will be seen that by rotating the valve 20 from the position shown in Fig. 7 to its position shown in Fig. 6 that for a short interval of time the main duct 20a in the valve will form a passage-way between the main conduit 18e of the valve casing 18ZL to the conduit 18', whereby a supply of gas will flow to the pilot 19 and cause a flash at its free or lighted end.

19' indicates a valve for regulating the flow of gas through the conduit 21 to the conduit 18'.

As shown in the drawings the Valve casing 18a is preferably constructed to form a conically shaped valve receiving Chamber 18?1 that is closed at its inner end, the purpose of which is to reduce to a minimum the 'probability of leakage of the gas around the valve 20 and to obviate the construction or use of a valve lock retainer or packing at this free end of the valve, as is necessary where the valve plug extends entirely through the valve casing. The valve 20 is of conical shape adapted to fit Closely within the valve receiving Chamber 18, and is provided with means for pressing it tightly against the walls of its receiving Chamber or seat 18a. These means preferably comprise a Cap or collar 22 screw threaded into the open end of the valve receiving Chamber 18d and having a reduced portion 22a provided with screw threads adapted to receivo a nut 23, which is provided with a screw threaded sleeve portion 23.

20d indicates a stem or rod connected with the valve 20 and extending through the Cap or collar 22 and nut 23.

211 indicates a tube or sleeve having screw threaded connection with the sleeve port-ion 23a of the nut 23 and provided with an in- Wardly eXtending fiange 24EL at its free end.

25 indicates a coiled spring surrounding the stem 20d and interposed between the fiange 24a and a pin or collar or abutment 20e carried by the valve stem 20. By this Construction of valve retaining mechanism it will be seen that the tension of the spring 25 upon the pin or collar 20e will operate to press the valve 20 closely against the walls of the valve receiving chamber 18a.

26 indicates a rocker carried by the outer end of the valve stem 20d for the purpose of rotating or manipulating the valve in opposite directions. The opposite ends of this rocker have connected to them chains or cords, as indicated at 26a, 26h. The cap 22 is preferably formed with a recess 22b to receive a projection 20I carried by the valve stem 20d, which projection 20f will engage the opposite end walls of the recess 22b to limit the rotation of the valve 20 when opened and closed.

In the above construction of valve mechanism it will be seen that the valve 20 is always inaintained tightly in proper position against its seat, and that the valve stem 2011 and sleeve 2-1 are of a length to eXtend laterally beyond the walls of the inner casing,

so that the spring 25 is arranged out of the path of the intense heat ascending through the upper end of the inner casing 14.

As the tube or sleeve 24 is screw threaded at its inner end to the nut sleeve 23a, it will be understood that by the rotation of the tube 01' sleeve 24 the tension of the spring 25 may be increased to more tightly press the valve 20 against its seat and to take up the wear between these parts.

To those skilled in the art of making apparatus of the class described, many alterations in construction and widely differing en'ibodiments and applications of my invention will suggest themselves, without departing from the spirit and scope thereof. My disclosures and the description therein are purely illustrative, and are not intended to be in any sense limiting.

[t will be noted that the arrang'ement'of parts is such as to permt a very compact assembly of the mantles, and the concentration of the heat therefrom, for the most part, in a comparatively small space.

The valve mechanism which I have devised I have found to be peculiarly adapted for use in connection with a gas lamp of the type shown in the drawings, wh-erein the valve for controlling the gas supply is arranged in the path of the products of combustion which pass upwardly from the burners. It will b-e noted that the valve 20 is tapered to a considerable extent and thatit is yieldingly held against its seat, so as to allow for the movementof the valve relative to its seat under the action of expansion of the metal when subjectcd to the heat of the escaping gases of combustion. This construction insures that the valve will be readily turnable irrespective of the heat to which it is subjected, and will be free to expand under said heat. It will be furt-her noted that the main duct 20a through the valve serves as a duct for establishing communication between the main duct 18e of the valve casing and the flash duct 21 for the purpose of fiashing the pilot light.

l/V hat I claim is:

1. The combination of an inclosing casing, a vertically extending longitudinally corrugated flue, means for supporting the flue, a gas supply pipe, a seri-es of depending pipes leading from said gas supply pipe and eX- tending longitudinally of the said flue between the outer walls thereof and the inner walls of the casing, the free end of each of said pipes being provided with an inverted mantle, and means for controlling the supply of gas to said pipes.

2. The combination of an inclosing casing, a vertically extending longitudinally corrugated fiue arranged to form passageways between the outer walls of the fiue and the inner walls of the casing, a plate for closing the lower ends of the passageways, al gas supply pipe, a series of depending pipes leading from said gas supply pipe and extending longitudinally of the said fiue through said passageways, the free end of each of said pipes being provided with an inverted mantle, means for controlling the supply of gas to said pipes, and each of said pipes 'being provided with independently controlled gas and air inlet valves.

3. In a gas lamp, the combination of an inclosing casing, a fiue concentrically arranged within the said inclosing casing, the said fiue being corrugated longitudinally to form chambers or passage-ways between its outer walls and the inner walls of the inclosing casing, gas pipes leading through said passage-ways, an annular base within the inclosing casing, a plate mounted on the base for closing the passageways between the flue and the casing, lighting mechanism arranged in an inverted position and mounted on the lower ends of the said gas pipes* and below the lower end of the said flue, and means for controlling the supply of gas to each of the said gas pipes.

4. In a gas lamp, the combination of an inclosing casing, a longitudinally corrugated flue, means for supporting the fiue in the casing, the outer extending corrugations of the said flue being relatively larger than the inner extending corrugations thereof, a series of gas pipes extending longitudinally of the flue and arranged in close proximity to the walls of the inner co'rrugations of the fiue and between the outer walls thereof and the inner walls of the inclosing casing, each of said pipes being provided with inverted light mantles at its free end, and means for controlling the supply of gas to each of said gas pipes.

5. In a gas lamp, the combination of a casing provided with an annular base, a longitudinally corrugated flue vertically arranged within the casing and arranged to form passage-ways between the outer walls of the flue and the inner walls of the casing, an annular plate mounted on the base for closing the lower ends of said passageways and formed with a series of openings, the inner perimeter of the said plate corresponding to the perimeter of the inner walls of the said flue, a series of gas pipes extending through the said passage-ways between the flue and the said casing, and through the openings formed in the closing plate, a series o-f gas mantles, one for each of said gas pipes, mounted in inverted position on their lower ends, and means forl controlling the supply of gas to said pipes.

6.- In a gas lamp, the combination of a casing, a longitudinally corrugated flue arranged within the casing, and adapted to form passage-ways between the flue and the inner walls of the said casing, the said gas pipes being each provided with independently Controlled gas valves and air intake valves, the said gas pipes extending below the lower end of the said flue and each provided with an inverted gas mantle, and meansfor closing the lower end of the said passage-ways to prevent the heat and products of combustion from rising up and around the said gas pipes and their gas and inlet valves.

7. In a gas lamp, the combination of a casing provided with an annular base, and formed with a series of openings above said base, a longitudinally corrugated flue arranged within the casing, and adapted to form passage-ways between the flue and the inner walls of the said casing, the outer extending corrugations of the flue being relatively larger than the inner corrugations thereof to permit the heat and products of combustion from the said gas mantles to rise directly therefrom, the said gas pipes being each provided with independently Controlled gas valves and air intake valves, the said gas pipes extending below the lower end of the said flue and each provided with an inverted gas mantle, and means mounted on said base for closing the lower end of the said passage-ways to prevent the heat and products of combustion from rising up and around the said gas pipes and their gas and inlet valves.

8. In a gas lamp, the combination of a casing having an annular base, said casing being formed with a series of air inlet openings above and below said annular base, a fiue corrugated longitudinally to form pas- Sage-ways between the said flue and the said casing, a series of gas pipes leading through said passage-ways, and provided with inverted gas mantles at their lower ends below the said base of the casing, each of said gas pipes being provided with air inlet valves in close proximity to the openings formed in the casing above the said annular base, means for 'supporting the flue and for closing the lower ends of said passage-ways to prevent a circulation of air from the said passage-ways to the fiue or to the space below said base, and to prevent heat or products of combustion rising through said pas- Sage-ways from the gas mantles, and means for controlling the supply of gas through said gas pipe.

9. In a gas lamp, the combination of a casing having an annular base, said casing being formed with a series of air inlet openings above and below said annular base, a flue corrugated longitudinally to form pas- Sage-ways between the said flue and the said casing, a series of gas pipes leading through said passage-ways, and provided with inverted gas mantles at their lower ends below the said base of the casing, each of said gas pipes being provided with airV inlet valves, means mounted on the base for closing the lower ends of said passage-ways to prevent a circulation of air from the said passage-ways to the flue or to the space below said base, and to prevent heat or products of combustion rising through said pas- Sage-ways from the gas mantles, means for controlling the supply of gas through said gas pipe, and a skirt supported by said base' and arranged to defiect air circulating through the openings formed in the casing below the base downwardly.

10. In a gas lamp, the combination of a casing having an annular base, said casing being formed with a series of air inlet openings above and below said annular base, a fiue corrugated longitudinally to form pas- Sage-ways between the said flue and the said casing, a series of gas pipes leading through said passage-ways, and provided with inverted gas mantles at their lower ends below the said base of the casing, each of said gas pipes being provided with air inlet valves, means mounted on the base for closing the lower ends of said passage-ways tov prevent a circulation of air from the said passage-ways to the flue or to the space below said base, and to prevent heat or products of combustion rising through said pas- Sage-ways from the gas mantles, means for ranged within said casing, and arranged to form a series of passage-ways between its outer walls and the said casing, means for sinoporting the said flue, and for closing the lower ends of said passage-ways, a gas supply means arranged above the said casing, a series of pipes connected with said supply means, each of said pipes extending downwardly through one of said passage-ways and the said closing means therefor, and provided on its lower end with an inverted gas mantle, and means for controlling the supply of gas through said gas supply means.

12. In a gas lamp, the combination of a casing having an open upper end, a longitudinally corrugated flue concentrically arranged within said casing, and arranged to form a series of passage-ways between its outer walls and the said casing, means for closing the lower ends of said passage-ways, gas supply means arranged above the said casing, a series of pipes connected with said supply means, each of said pipes extending downwardly through one of said pas'sageways and the said closing means therefor, and provided on its lower end with an inverted gas mantle, means for controlling the supply of gas through said gas supply means, and a hood arranged above the said controlling means for protecting the open end of the casing.

` 13. In a gas lamp, the combination of a casing, a flue concentrically arranged therein, means for supporting the fiue, the said fiue being longitudnally corrugated to form passage-ways between its outer walls and the inner walls of the said casing, a series of inverted gas mantles, a series of gas pipes each connected with a gas mantle, and leading through one of said passage-ways, eachof said gas pipes comprising a supply pipe, a miXing tube provided with an air intake valve, and a coupling piece provided with a gas valve interposed between te supply pipe and the adjacent mixing tube, and means for controlling independently each of said gas and air intake valves.

l-. In a gas lamp, the combination of a casing, a flue concentrically arranged therein, means for supporting the flue, the said fine being longitudinally corrugated to form passa-ge-ways between its outer walls and the inner walls of the said casing, a series of inverted gas mantles, a series of gas pipes each connected with a gas mantle, and leading through one of said passage-ways, each of said gas pipes comprising a supply pipe, a mixing tube provided with an air intake valve, and a coupling piece provided with a gas valve interposed between the supply pipe and the adjacent mixing tube, means for controlling independently each of said gas and air intake valves and separate means for controlling the supply of gas to all of said gas pipes.

15. In a gas lamp, the combination of a casing, a flue extending through said casing and corrugated longitudinally to form passage-ways between its outer walls and the inner walls of the casing, a series of gas mantles arranged below the lower end of the flue, a series of gas pipes leading through said passage-ways and connected with said gas mantles, independently controlled air intake valves arranged in each of said pipes, the said casing being provided with two series of air inlet openings, one series being above the lower end of the said flue and the other series of openings being bel ow the said end, and means intermediate the said series of openings for closing the passage-ways between the fiue and the casing, the said means being arranged below the said air intake valves to prevent the heat and products of combustion from rising up and around the air inlet valves.

16. In a gas lamp, the combination of a casing, a fiue extending through said casing and corrugated longitudinally to form passage-ways between its outer walls and the inner walls of the casing, a series of gas mantles arranged below the lower end of the flue a series of 0as aiies leadino' throu'h 9 b b h said passage-ways and connected with said gas mantles, independently Controlled air intake valves arranged in each of said gas pipes, the said casing being provided with two series of air inlet openings, one series being above the lower end of the said fine and the other series of openings being below the said end, and means intermediate the said series of openings for closing the passage-ways between the fiue and the casing, the said means being arranged below the said air intake valves to prevent the heat and products of combustion from rising up and around the air inlet valves, and means for defiecting the air eirculating through the last said series of openings downwardly.

17. In a gas lamp, the combination of a casing, a flue extending through said casing and corrugated longitudinally to form passage-ways between its outer walls and the inner walls of the casing, a series of gas mantles arranged below the lower end of the flue, a series of gas pipes leading through said passage-ways and connected with said gas mantles, independently controlled air intake valves arranged in each of said gas pipes, the said casing being provided with two series of air inlet openings, one series being above the lower end of the said fiue and the other series of openings being below the said end, and means intermediate the said series of openings for closing the pas- Sage-ways between the flue and the casing, the said means being arranged below the said air intake valves to prevent the heat and products of combustion from rising up and around the air inlet valves, and a skirt having an outwardly, flaring open end for deflecting the air circulating through the last said series of openings downwardly.

18. In a gas lamp, the combination of a casing, a fiue extending through said casing and corrugated longitudinally to form passage-ways between its outer walls and the inner walls of the casing, 'a series of gas mantles arranged below the lower end I of the flue, a series of gas pipes leading through said passage-ways and connected with said gas mantles, independently controlled air intake valves arranged in each of said gas pipes, the said casing being provided with two series of air inlet openings, one series being above the lower end of the said flue and the other series of openings being below the said end, and means intermediate the said series of openings for closing the lower ends of the passage-ways between the fiue and the casing, the said means being arranged below the said air intake valves to prevent the heat and products of combustion from rising up and around the air inlet valves.

19. In a gas lamp,'the combination of a casing, a flue arranged within said casing and corrugated longitudinally from end to end to form passageways between its outer wall and the inner wall of the casing, a series of gas pipes, one for each passageway, extending therethrough, mantles carried by said pipes, and means extending between the outer walls of the fiue and the inner walls of the casing foi` closing the passageways at or near their lower ends.

20. In a gas lamp, the combination of a casing, a flue arranged within said casing and corrugated longitudinally from end to end to form passageways between its outer wall and the inner wall of the casing, a series of gas pipes, one for each passageway, extending therethrough, mantles carried by said pipes, and means eXtending between the outer walls of the fiue and the inner walls of the casing for closing the passageways at or near their lower ends, the said closing means comprising a base carried by the casing and a plate.mounted on the said base.

21. The combination with a plurality of burners, mantles therefor, and a fuel supply pipe arranged above the said burners, of a fuel regulating valve mechanism arranged directly in the path of the escaping products of combustion, comprising a casing having a conical seat, and a valve yieldingly held against said seat, the yielding holding means for said seat being arranged at one side and out of the path of the escaping products of combustion.

22. The combination with a plurality of burners,mantles therefor, and a fuel supply pipe arranged above the said burners, of a fuel regulating valve mechanism arranged directly in the path of the escaping products of combustion, comprising a casing having a conical seat closed at its inner end, a conical valve, and a spring arranged at one side and out of the path of the escaping products of combustion for yieldingly supporting the valve against said seat.

23. The combination with a plurality of burners, mantles therefor, and a fuel supply pipe arranged above the said burners, of a fuel regulating Valve mechanism arranged directly in the path of the escaping products of combustion of a hydrocarbon lamp, comprising a casing having a conical seat closed at its inner end, a conical valve having a stem extending laterally from said casing, a detachable collar surrounding said Valve stem and closing the open end of the said casing, a paclring gland nut screw threaded to said collar, a sleeve connected to said nut, an abutment on said valve stem within said sleeve, and a spring between said abutment and sleeve arranged to yieldingly press the valve against its seat. w

24. The combination with a plurality of pipes, burners carried thereby, and a fuel supply pipe arranged above the said burners, of a fuel regulating valve mechanism for location in the path of the escaping products of combustion of a hydrocarbon lamp, comprising a valve casing formed with a supply chamber, a valve seat, a main duct leading from the supply ch'amber to the valve seat, a supplemental supply duct leading from the supply Chamber to the valve seat, a main pilot duct leading from the supply Chamber, a supplemental pilot duct leading from a port in the valve seat to the main pilot duct, a main escape duct leading from the valve seat to all of the burner pipes eXcept one, a supplemental escape duct leading from the valve seat to the remaining burner pipe, and a valve having a main duct with ports registering with the main supply and escape ducts in the valve casing and arranged to move into and out of registry therewith, and adapted to establish communication between said main supply duct and said supplemental pilot duct at a predetermined interval, the said valve also having a pair of auxiliary ducts, one adapted to register with the supplemental supply and escape ducts of the valve casing when the main duct in the valve registers with the main supply and escape ducts in the valve casing, and the other adapted to register with the supplemental supply and escape ducts when the main duct of the valve is out of registry with the main supply and escape ducts in the valve casing.

1,oo7,114E

25. In a gas lamp, the combination of a, skrt supported by and dependng down- 10 oaslng, a longltudlnally corrugated fiue, Wardly from szt-1d fiue supportlng means. means for suppol'tlng sald flue Wlthln sud In testnnony WhereoiI I affix my slgnacaslng and permlttlng lt to be removed ture,1n the presence of. two Wltnesses.

therofroln, a series of O'as pipes extendinff f longtudinally of said file between its oute' MARTIN L' EISER' Wall and the inner Wall of said casing, an WTtnesses: nlverted lnantle arranged at the lower end T. K. HARRIs, of each of sald gas plpes, amd a cone shaped M. E. LUTZ.

Copes of this patent may be obtained for five eents each, by addressing the Commssioner of Patents. Washington, D. 6. 

